int ospf_sock_init (int packet_flag)
{
int ospf_sock;
int ret, hincl = 1;
int ospf_hello = OSPF_IP_HELLO_PACKET;
int ospf_other = OSPF_IP_OTHER_PACKET;
ospf_sock = socket (AF_INET, SOCK_RAW, IPPROTO_OSPFIGP);
if (ospf_sock < 0)
{
int save_errno = errno;
zlog_err ("ospf_read_sock_init: socket: %s", safe_strerror (save_errno));
exit(1);
}
#ifdef IP_HDRINCL
/* we will include IP header with packet */
ret = setsockopt (ospf_sock, IPPROTO_IP, IP_HDRINCL, &hincl, sizeof (hincl));
if (ret < 0)
{
int save_errno = errno;
zlog_warn ("Can't set IP_HDRINCL option for fd %d: %s",
ospf_sock, safe_strerror(save_errno));
}
#elif defined (IPTOS_PREC_INTERNETCONTROL)
#warning "IP_HDRINCL not available on this system"
#warning "using IPTOS_PREC_INTERNETCONTROL"
ret = setsockopt_ipv4_tos(ospf_sock, IPTOS_PREC_INTERNETCONTROL);
if (ret < 0)
{
int save_errno = errno;
zlog_warn ("can't set sockopt IP_TOS %d to socket %d: %s",
tos, ospf_sock, safe_strerror(save_errno));
close (ospf_sock); /* Prevent sd leak. */
return ret;
}
#else /* !IPTOS_PREC_INTERNETCONTROL */
#warning "IP_HDRINCL not available, nor is IPTOS_PREC_INTERNETCONTROL"
zlog_warn ("IP_HDRINCL option not available");
#endif /* IP_HDRINCL */
ret = setsockopt_ifindex (AF_INET, ospf_sock, 1);
if (ret < 0)
{
zlog_warn ("Can't set pktinfo option for fd %d", ospf_sock);
}
ret = setsockopt_so_recvbuf (ospf_sock, OSPF_PACKET_RECV_BUFFLEN);
if (ret < 0)
{
zlog_warn ("Can't set SO_RCVBUF %d to socket %d",
OSPF_PACKET_RECV_BUFFLEN, ospf_sock);
}
if(packet_flag == OSPF_IP_HELLO_PACKET)
{
set_nonblocking(ospf_sock);
setsockopt (ospf_sock, SOL_SOCKET, SO_SET_OSPF_FILTER, &ospf_hello, sizeof (ospf_hello));
}
if(packet_flag == OSPF_IP_OTHER_PACKET)
{
set_nonblocking(ospf_sock);
setsockopt (ospf_sock, SOL_SOCKET, SO_SET_OSPF_FILTER, &ospf_other, sizeof (ospf_hello));
}
return ospf_sock;
}
int
ospf_sock_init (void)
{
int ospf_sock;
/*
* XXX warning: unused variable `tos'
* tos should be ifdefed similarly to usage
*/
int ret, tos, hincl = 1;
if ( ospfd_privs.change (ZPRIVS_RAISE) )
zlog_err ("ospf_sock_init: could not raise privs, %s",
safe_strerror (errno) );
ospf_sock = socket (AF_INET, SOCK_RAW, IPPROTO_OSPFIGP);
if (ospf_sock < 0)
{
int save_errno = errno;
if ( ospfd_privs.change (ZPRIVS_LOWER) )
zlog_err ("ospf_sock_init: could not lower privs, %s",
safe_strerror (errno) );
zlog_err ("ospf_read_sock_init: socket: %s", safe_strerror (save_errno));
exit(1);
}
#ifdef IP_HDRINCL
/* we will include IP header with packet */
ret = setsockopt (ospf_sock, IPPROTO_IP, IP_HDRINCL, &hincl, sizeof (hincl));
if (ret < 0)
{
int save_errno = errno;
if ( ospfd_privs.change (ZPRIVS_LOWER) )
zlog_err ("ospf_sock_init: could not lower privs, %s",
safe_strerror (errno) );
zlog_warn ("Can't set IP_HDRINCL option for fd %d: %s",
ospf_sock, safe_strerror(save_errno));
}
#elif defined (IPTOS_PREC_INTERNETCONTROL)
#warning "IP_HDRINCL not available on this system"
#warning "using IPTOS_PREC_INTERNETCONTROL"
/* Set precedence field. */
tos = IPTOS_PREC_INTERNETCONTROL;
ret = setsockopt (ospf_sock, IPPROTO_IP, IP_TOS,
(char *) &tos, sizeof (int));
if (ret < 0)
{
int save_errno = errno;
if ( ospfd_privs.change (ZPRIVS_LOWER) )
zlog_err ("ospf_sock_init: could not lower privs, %s",
safe_strerror (errno) );
zlog_warn ("can't set sockopt IP_TOS %d to socket %d: %s",
tos, ospf_sock, safe_strerror(save_errno));
close (ospf_sock); /* Prevent sd leak. */
return ret;
}
#else /* !IPTOS_PREC_INTERNETCONTROL */
#warning "IP_HDRINCL not available, nor is IPTOS_PREC_INTERNETCONTROL"
zlog_warn ("IP_HDRINCL option not available");
#endif /* IP_HDRINCL */
ret = setsockopt_ifindex (AF_INET, ospf_sock, 1);
if (ret < 0)
zlog_warn ("Can't set pktinfo option for fd %d", ospf_sock);
if (ospfd_privs.change (ZPRIVS_LOWER))
{
zlog_err ("ospf_sock_init: could not lower privs, %s",
safe_strerror (errno) );
}
return ospf_sock;
}
